How the Brown Tree Snake made themselves at home, disrupted the island's ecosystem, and created problems for its people and native animals. More →

Bullfrogs are big eaters, consuming almost anything that fits in their mouths. Meals include birds, turtles, snakes, and even other frogs. At one time, bullfrogs lived only in North America… More →

How the Giant African Snail destroyed field crops and flower gardens and spread diseases to people thousands of miles from their native Africa. More →

Gray squirrels are known for their bushy tails and hoarding habits. These North American natives were imported to parts of Europe and South Africa as pets, but quickly went from pets to… More →

The Monitor Lizard is large; adults can grow up to 7 feet in length. A vicious predator that will eat anything it can fit into its mouth. Native to Africa, the Monitor Lizard has successfully More →

The Walking Catfish have upset the balance of the ecosystems and hurt local economies. More →

Centuries ago, explorers brought hogs to the Americas as a food source. Some of these boars made it into the wild, where their offspring have managed to survive ever since. Wild boars will… More →

Less than a decade ago, there were only a few pythons in the everglades. Today more than 100,000 of them are slithering around south Florida, crushing what was already a delicate ecosystem.… More →